Hawaii is on the verge of being the first state in the U.S. to set a goal of generating all of its electricity from renewable energy sources.

Hawaii has the highest solar penetration in the nation, with one out of every eight homes having ‘gone solar.’

Under a bill the Hawaii Legislature just passed, 100 percent of the state’s electricity would be generated with renewables by 2045. If Gov. David Ige approves the measure — he has until the end of June to sign it — it will put the state’s climate goals far ahead any other, and extend Hawaii’s Clean Energy Initiative through mid-century. The initiative aims to reduce the state’s dependency on oil, which generates most of its electric power.

Hawaii has more than climate change in mind in completely converting to renewables. The state’s goal, according to the bill, is to stop importing fuel. The state imports about 93 percent of all its energy, making its residential electric power rates among the most expensive in the nation — about 175 percent of the U.S. average. Already, the state gets about 22 percent of its electricity from renewables, mostly from wind and solar.

Anthony Kuh, director of the Renewable Energy and Island Sustainability Group at the University of Hawaii at Manoa, said the target presents many challenges, but it can be achieved after advancements are made in energy storage and smart grid technologies.

“We don’t probably have the technology today to do everything,” he said. “We do have some time to do this.”

If Hawaii’s 2045 target becomes law, it will follow several similar but less ambitious greenhouse gas emissions and renewables targets that other states have set.

California Gov. Jerry Brown announced the state’s new targets to obtain half its electricity from renewables and slash emissions to 40 percent below 1990 levels by 2030. New York and California have “80 by 50” plans, which aim to cut their emissions to 80 percent below 1990 levels by mid-century.

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